Should we support env var and yaml versions of short name cli options?

[siladu]

The status quo is confusing. W3S kind of half supports them: https://github.com/ConsenSys/web3signer/blob/master/commandline/src/main/java/tech/pegasys/web3signer/commandline/valueprovider/EnvironmentVariableDefaultProvider.java#L36

If you have aliases of --logging, -l then only --logging will be supported.
But if you have one name of -l then it'll be supported.
I also think using longestName is a bug because --logging, --log, -l will only support --logging.

Similar question for YAML file support.

Besu explicitly filters out single dash prefixed options https://github.com/hyperledger/besu/blob/f43ae51d6f00984c8f87b67999f7a499987dbd49/besu/src/main/java/org/hyperledger/besu/cli/util/EnvironmentVariableDefaultProvider.java#L57-L58